Robert:
This may not apply to you. My apologies if it doesn't. I can't remeber if your '92 is CIS-E of LH.
If CIS-E, the following site shows a pressure tester designed for CIS-E. Not suggesting you buy from these guys - just throwing up some info.
http://www.drivewerks.com/catalog/shopcart/TOOL/POR_TOOL_CAT447_pg21.htm
I haven't had to go down this road yet, but my investigation reveals that CIS-E system use a special fuel pressure gauge. Maybe that's malarky and I need to dig more.
Hopefully you'll get a better reply than this one.